I'm running Ubuntu 17.04, "zesty".
I need to install version 8 of Google Protocol Buffer.
I can find the package at https://packages.ubuntu.com/trusty/amd64/libprotobuf8/download
The instructions state that aptitude is the preferred way to download and install the package.
I've added the following line to the end of
deb http://mirrors.kernel.org/ubuntu/pool/main/p/protobuf trusty main
Then I run aptitude:
$ sudo aptitude install libprotobuf8=libprotobuf8_2.5.0-9ubuntu1_amd64.deb Unable to find a version "libprotobuf8_2.5.0-9ubuntu1_amd64.deb" for the package "libprotobuf8" Unable to apply some actions, aborting $ sudo aptitude install libprotobuf8=2.5.0-9ubuntu1 No packages will be installed, upgraded, or removed. 0 packages upgraded, 0 newly installed, 0 to remove and 6 not upgraded. Need to get 0 B of archives. After unpacking 0 B will be used.
Using apt-get doesn't work either:
$ sudo apt-get install libprotobuf8=2.5.0-9ubuntu1 Reading package lists... Done Building dependency tree Reading state information... Done E: Can't find a source to download version '2.5.0-9ubuntu1' of 'libprotobuf8:amd64'
When I run
sudo apt-get update
... Err:3 http://mirrors.kernel.org/ubuntu/pool/main/p/protobuf trusty/main amd64 Packages 404 Not Found ... W: The repository 'http://mirrors.kernel.org/ubuntu/pool/main/p/protobuf trusty Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. E: Failed to fetch http://mirrors.kernel.org/ubuntu/pool/main/p/protobuf/dists/trusty/main/binary-amd64/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
Package: libprotobuf8 Status: install ok config-files Section: libs Installed-Size: 1083 Architecture: amd64 Multi-Arch: same Source: protobuf Version: 2.5.0-9ubuntu1 Config-Version: 2.5.0-9ubuntu1 Depends: libc6 (>= 2.14), libgcc1 (>= 1:4.1.1), libstdc++6 (>= 4.3), zlib1g (>= 1:1.1.4) This package contains the runtime library needed for C++ applications. Homepage: https://code.google.com/p/protobuf/ Original-Maintainer: Robert S. Edmonds <email@example.com>
However I can't find libprotobuf.so.8 anywhere on the system.
What am I doing wrong?